What Specialist should I Consultant​

Hi... The last time I was at a doctor's was in 2010 for malaria and a few months ago for viral... I generally rely on home remedies and over the counter meds... I am generally dizzy and find it hard to concentrate or read or comprehend complex instructions... Although I have got my eyes tested multiple times and find no trouble there... Sight is disturbed... I can't travel for long in vehicles too... I have been ignoring all this for a long time... However I have been losing strength over the years... Now I Feel tired and lethargic all the time... The sole of my feet feel  like I have just taken a long walk even after waking up!... I have had a desk job for the past year... I have a tendency to gain weight too... My fingers r getting chubbier too... Generally I would resort to eating less and walking more to somehow control it... Off late I find it difficult to walk and get winded easily... I can't eat any lesser than this else I will surely starve...